Eraser



Dec. 3o, 1941.

. ERASER Filed Dec. 18, 1939 INVENTOR. eorgejlffzn cd BYv ATTORNEYI Patented Dec. 35, 1941 Emissie George N. Dunn, Rensselaer, Ind. Application December 1s, 1939, serial m3119361 (ci. 12o- 36) 7 Claims.

This invention relates to erasers, and more particularly is directed to an attachment for erasers for supporting the same upon magneticsurfaces, such as iron, steel and the like.

Heretofore it has been common for individuals who use erasers frequently, such as draftsmen, stenographers and the like, to misplace the same at frequent intervals, producing both annoyance and loss of time before they are recovered. This is due mainly to the fact that erasers are small objects which can be easily hidden under papers and the like on a desk, and are therefore not readily accessible when it is desired to use the same.

The present invention contemplates providing the ordinary erasers now in general use with magnetic means so arranged that the eraser can be readily held on any magnetic surface, such as the side of a typewriter, the edge of a metal desk, or any similar article of furniture or magnetic structure which is readily accessible to the individual. By magnetic surface I intend to dene a surface of any material having paramagnetic properties, i. e., capable of being magnetized or having magnetic permeability.

In carrying out the present invention, I preferably employ a magnet of the type recently developed which has very high magnetic characeraser member therein whereby the same holder can be employed and successive eraser bodies teristics with respect to its mass, and which is known under the trade name of A1nico. This.

material is capable of receiving and retaining a very high percentage of magnetism such that only a small mass thereof can sustain or suspend considerable weight when placed in contact with a magnetic surface.- In the present invention, I contemplate securing a magnetic member of this type to the eraser in such manner that its magnetic surface will always be available so that the eraser can be clamped by a magnetic action to any adjacent magnetic l surface. In the preferred form of the invention I preferably mount the magnetvfor pivotal move-l ment on an eraser, such as the circular eraser and brush commonly used byfstenographers, whereby the eraser body has pivotal movement about the magnet so that it will always hang suspended from the magnetic surface in the same relative position, which facilitates its accessibility and use `bythe stenographer.

In this connection, I have also devised a new design of eraser especially adapted for this purpose which has the magnet pivotally mounted adjacent the bristle end of the eraser holder. the arms of the holder being so constructed and arranged as to detachably receive a disc-like mounted therein as the erasers wear out.

In still another form of the invention I conv template attaching the magnetic structure to erasers of the conventional type nowin use With the means of attachment being so arranged that the magnetic-member can be readily detached when the eraser is worn out and quickly attached to a, new eraser. This provides economy in that only one magnetic member may be employed, and in the case of the detachable eraser with the magnet secured in the holder, eliminates the necessity of buying a new holder and brush whenever the eraser is worn out.

Other objects and advantages of the present invention will be more apparent from the following detailed description which, taken in conjunction with the accompanying drawing, will disclose to those skilled in the art the particular construction and operation of a preferred form of my invention.

In the drawing:

Figure 1 is an elevational view of one embodil ment of the invention;

Figure 2 is a conventional view taken substantially on line 2--2 of Figure l;

Figure 3 is a partial sectional .view of a modied form of the invention, e

Referring now in detail to Figures 1 and 2, I have shown therein an eraser holder indicated generally at 5, comprising a collar portion E adapted to receive and clamp the bristles 1` in position for forming a whisk or brush to remove eraser particles from the paper, Extending from the bristle clamping portion 6 of theeraser is a pair of parallel arm portions 8 which are preferably formed integral with the eraser holder and are of spring-like material having enlarged ends 9 formed with indentations or detents l0 therein. l

The arms 8 form therebetween a channel adapted to receive the eraser member l2 comprising a disc of erasing material having its center provided with the grommet or eye |*3 which is clinched over at its opposite ends to form circular bosses thereabout. As the eraser l2 is inserted between the arms 8, it is moved to a position Where the detents I0 of the arms spring into the recesses formed at opposite ends of the grommet I3, thereby holding the eraser I2 against displacement and at the same time supporting the same for pivotal movement.

A suitable staple, rivet, or the like, indicated at Il, extends through the bristle end of the holder 5, and is provided with a shouldered head portion I 5 adapted to extend through the base I6 of a magnet having the extending arm portions I1. This magnet is preferably formed of a highly magnetizable material, such as A1nlco, and is preferably shaped into a horseshoe or U form with the base thereof pivotally supported on the shoulder portion I5 of the staple or pin I4. The end of the pin III which extends through the magnet I6 is headed over so as to secure the magnet against displacement, While at the same time allowing the magnet to have pivotal movement relative to the pin.

It will be apparent from the construction thus far described that whenever the ends of the magnet I6 are brought into contact with a magnetic surface such as the surface I8 of Figure 2,

the magnet will be retained on such surface and the eraser l2 and its holder 5 willgswing around into a depending position with the bristle 'I uppermost due to the off-center relation of the magnet with respect to the center of gravity of the eraser assembly. Due to this arrangement,

the eraser will always swing into the positionshown in Figure 2 when the magnetic member I6 is applied to a'magnetic surface. It Will therefore be in a position such as to facilitate grasping the same for an erasing operation or utilizing the brush for a whisking operation, and may be readily restored to its position by merely bringing the same into contact with the magnetic surface I8.

In Figure 3 I have shown a modified form of construction in which a conventional type of eraser is provided having the erasing disc 20 secured by means of the grommet 22 between the arms 23 of a holder 24 having an end portion 25 in which the bristles 26 of a brush are secured by means of the staple 21.

Extending through the grommet 22 is a pin 28 having spring arms 29, each terminating in headed portions 30. The spring arms 29-are adapted to be pushed together to bring the headed ends 30 into abutment whereby the pin can be passed through the grommet 22, and when the arms are released, the headed ends 30 spring apart a sufficient distance to pivotally secure the pin 28 in the grommet opening and against axial displacement therefrom. The opposite end of the pin is provided with a reduced portion 32 receiving the magnetic member I6 and headed over to secure the magnet against displacement therefrom. Theuse of this construction is desired when conventional erasers are at hand, as the magnetic member with its clip can be manufactured at relatively small cost and can be applied to successive erasers of the conventional type without replacement of the magnetic attachment. Similarly, in the embodimentpf Figures 1 and 2, the holder 5 and the magnet are permanently secured together, and the eraser disc I2 is replaced as required by merely withdrawing the used eraser from between the arms 8 and inserting a new one.

It is therefore believed apparent that I have provided a novel type of eraser and attachment which facilitates the useA of the eraser and eliminates the tendency to misplace or lose the same.

I am aware that various changes may be made in certain details of the present construction without departing from the underlying principles thereof, and I therefore do not intend to be limited except as den-ed by the scope and spirit of the appended claims.

portion provided with and a magnet secured to I claim: 1. An eraser comprising a body member ncluding a pair of parallel extending spring arms having instruck alined detents adjacent one end thereof adapted to rotatably support an eraser disc between said arms, and means for rotatably securing a magnetic member to the body member adjacent the other end for supporting the body member on a magnetic surface with said disc in depending position.

2. In combination, an eraser having a body a pivotally mounted erasmember, and means for magnetic member to said body member whereby said eraser can be supported from magnetic surfaces, said magnetic member being pivotally mounted coaxially with the pivotal mounting of the disc.

3.In combination, a body member having parallel spring arms extending therefrom and provided adjacent their ends with instruck detent portions, an eraser disc having a central grommet and adapted to be received within said arms with said detents engaging in the ends of said grommet for pivotally supporting said eraser between said arms, and means in said body member for pivotally securing a magnetic member to said body member for rotatably supporting the erase'r structure from a magnetic surface.

4. The combination, with a typewriter eraser having an erasing disc rotatably mounted at one end thereof, of a pivot pin extending through said eraser adjacent the opposite end thereof, one end of said pin whereby said eraser may be supported on and lie parallel to vertical magnetic surface with the disc-always in a depending position.

5. The combination, with a body member having parallel resilient arms extending from one end thereof and provided adjacent their ends with transversely alined instruck detents, and an eraser disc having a central grommet detachably engaged by said detents mounting said disc for rotation between said arms, of a pin extending ing disc, a magnetic pivotally securing said transversely through said body member and rotatable relative thereto, and means on one end of said pin for securing a magnetg thereto, whereby said body member is adapted to be supported on a vertical magnetic surface with the arms extending downwardly from said pin. y

'6. The combination, with a typewriter eraser body member, an erasing disc and means including a grommet rotatably mounting said eraser disc in said body member, of an attachment for said eraser for supporting it from any adjacent vertical magnetic surface, comprising a pin extending through said grommet and held against displacement axially therein, and a U- shaped magnet secured to one end of said pin.

7. The combination, with a typewriter eraser body member, an erasing disc and means including a grommet rotatably mounting said eraser disc in said body member, of detachable means for supporting said eraser member on -a vertical magnetic surface comprising a U-shaped magnet, a pin member having one end secured in the base of said magnet, the opposite end of said pin member being projected through said grommet whereby said magnet is rotatably supported relative to said body member, and resilient means on said opposite end of said pin normally preventing displacement of said pin out of said grommet.

GEORGE N. DUNN. 

